other U.S. states, as well as hundreds of countries worldwide. The coffee companies of Houston formed the Greater Houston Coffee Association in fall 2000. The industry then tried to make Houston a major coffee shipping port. Coffee sold through futures contracts may only be shipped to a New York Board of Trade-certified port, and Texas's ad valorem tax on warehouse inventories made it impossible for Houston to get such a certification. The tax was written into the Constitution of Texas, so the Greater Houston Coffee Association asked State Representative Joe E. Moreno and State Senator Mario Gallegos to present a constitutional amendment bill to exempt cocoa and coffee stored in Harris County warehouses from the tax. Voters approved the amendment in 2001. Since then Houston's role as a coffee port increased. After Hurricane Katrina hit New Orleans, much of the traffic switched to Houston. Demand on Texas oil increased, and many people from the northeast moved to Houston to profit from the trade. Pasadena has refineries, and the Port of Houston is among the busiest in the world. Since the 1980s oil bust, the Houston area aimed to diversify its industries. Employment In 2013, Houston was identified as the #1 U.S. city for job creation by the U.S. Bureau of Statistics after it was not only the first major city to regain all the jobs lost in the preceding economic downturn, but after the crash, more than two jobs were added for every one lost. Economist and vice president of research at the Greater Houston Partnership Patrick Jankowski attributed Houston's success to the ability of the region's real estate and energy industries to learn from historical mistakes. Furthermore, Jankowski stated that "more than 100 foreign-owned companies relocated, expanded or started new businesses in Houston" between 2008 and 2010, and this openness to external business boosted job creation during a period when domestic demand was problematically low. Walmart was the largest employer in Houston, with 31,900 employees. The second-largest was Administaff (now Insperity), with fewer than 21,900 employees. Tourism Tourist attractions in the Houston area include Space Center Houston and the original La Casida and Ninfa's. Previous attractions included tours of the Houston Astrodome and Gilley's. The Houston Bay Area and Galveston also have many other tourist attractions, including a Schlitterbahn Water Park, Kemah Boardwalk, Moody Gardens, beaches, fishing, pleasure boats, and many local seafood restaurants. The Houston Museum District, Houston